Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic
 
PerlMonks  

Re: Check For null Arguments

by nvivek (Vicar)
on Mar 14, 2013 at 04:52 UTC ( #1023368=note: print w/replies, xml ) Need Help??


in reply to Check For null Arguments

A better way to check for particular value is defined or not, use defined function in perl.

Syntax: defined EXPR

defined function will return true if EXPR has a value other than the undefined value "undef".
Defined function will return true even if the value of particular scalar is null string. To check whether value of scalar is defined and not null, use following code.

my $defined_string="Defined_value"; print "Value of defined_string is defined and its value:$defined_strin +g" if(defined $defined_string && $defined_string ne '');

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1023368]
help
Chatterbox?
and a kettle whistles...

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (1)
As of 2016-12-04 04:49 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    On a regular basis, I'm most likely to spy upon:













    Results (61 votes). Check out past polls.